JP2020132565A - Bathing agent - Google Patents

Abstract

To provide a bathing agent which comprises porous silicic anhydride, a carbonate and an organic acid, gives a dry skin feeling after bathing, hardly causes swelling of a packaging material even when stored by sealing in a packaging material and has excellent storage stability.SOLUTION: There is provided a bathing agent which comprise the following components (A) to (D): (A) 1.5 mass% or more and 10 mass% or less of porous silicic anhydride, (B) a carbonate, (C) an organic acid and (D) an amino acid-based surfactant, wherein the mass ratio [(D)/(A)] of the component (D) to the component (A) is 0.01 or more and 1 or less.SELECTED DRAWING: None

Description

The present invention relates to a bathing agent.

It is known that a bathing agent containing a carbonate and an organic acid can generate bubbles of carbon dioxide gas in bath water, enjoy the feeling of foaming, and obtain a blood circulation promoting effect by carbon dioxide gas.
It has been reported that porous silicic acid anhydride is added to a bathing agent containing a carbonate and an organic acid for the purpose of improving various performances of the bathing agent. For example, Patent Document 1 reports an effervescent bath agent containing a carbonate and an organic acid and further containing silicon dioxide and / or calcium silicate as an effervescent bath agent that generates fine bubbles and has excellent foamability. It is disclosed that porous silicon dioxide having an average particle size of 0.1 to 50 μm is used as the silicon dioxide. In Patent Document 2, an effervescent bath tablet obtained by compression-molding a mixture containing a carbonate, an organic acid, and porous light anhydrous silicic acid is smoothly compression-molded by a tableting machine and stable in storage. It has been reported that the properties are also excellent, and it is also disclosed that the blending amount of the porous light anhydrous silicic acid is 0.1 to 10% by mass based on the total amount of the effervescent bath tablets.

Japanese Unexamined Patent Publication No. 61-2403014 Japanese Unexamined Patent Publication No. 2003-95916

In recent years, due to the diversity of consumer tastes, it has become important to obtain a smooth skin feel after bathing.
However, since porous silicon dioxide has high hygroscopicity, a bath agent containing carbonate and organic acid and containing a larger amount of porous silicon dioxide than before is sealed in the packaging material in order to improve the feel of the skin. When stored, carbon dioxide gas may be generated due to the reaction between the water absorbed by the porous silicon dioxide and the carbonate and organic acid, causing swelling of the packaging material, and sufficient storage stability cannot be obtained. It was.

The present invention contains porous silicic anhydride, carbonate and organic acid to provide a silky feel after bathing, and the packaging material is less likely to swell even when sealed and stored in the packaging material. An object of the present invention is to provide a bathing agent having excellent storage stability.

The present inventor has found that a bath agent containing a predetermined amount of porous silicic acid anhydride, a carbonate and an organic acid, and further containing an amino acid-based surfactant can solve the above-mentioned problems.
That is, the present invention relates to the following.
[1] The following components (A) to (D):
(A) Porous silicic acid anhydride 1.5% by mass or more and 10% by mass or less (B) Carbonate (C) Organic acid (D) Amino acid-based surfactant is contained, and the component (D) with respect to the component (A) A bathing agent having a mass ratio [(D) / (A)] of 0.01 or more and 1 or less.
[2] A bath preparation product in which the bath preparation of the above [1] is sealed in a packaging material.

According to the present invention, it is possible to provide a bathing agent having a smooth skin feel after bathing and having excellent storage stability with less swelling of the packaging material even when the packaging material is sealed and stored.

[Bath agent]
The bathing agent of the present invention contains the following components (A) to (D):
(A) Porous silicic acid anhydride 1.5% by mass or more and 10% by mass or less (B) Carbonate (C) Organic acid (D) Amino acid-based surfactant is contained, and the component (D) with respect to the component (A) The mass ratio [(D) / (A)] is 0.01 or more and 1 or less.
By having the above-mentioned structure, the bathing agent of the present invention has a smooth skin feel after bathing, and even when it is sealed and stored in the packaging material, the packaging material is less likely to swell and has excellent storage stability. It becomes. The reason is not always clear, but it can be considered as follows.
The bathing agent of the present invention can obtain a good skin feel after bathing by setting the content of the porous silicic anhydride component (A) to a predetermined amount or more. Further, by reducing the content of the porous silicic acid anhydride to a predetermined amount or less, the moisture absorption of the bathing agent is reduced, and by containing the predetermined amount of the component (D), the water absorbed by the component (A) can be combined. , It is considered that the reaction with carbonates and organic acids can be suppressed and the storage stability of the bathing agent can be improved.

<Component (A): Porous silicic anhydride>
The bathing agent of the present invention contains porous silicic anhydride as the component (A). By containing the component (A), the bathing agent of the present invention can improve the skin feel after bathing.
In the present invention, the porous silicic acid anhydride means porous silica containing silicon dioxide (SiO ₂ · nH ₂ O) as a main component, and corresponds to the light silicic acid anhydride specified in the 17th revised Japanese Pharmacy. It is preferably porous silica (hereinafter, also appropriately referred to as "porous light anhydrous silicic acid").

The component (A) is porous from the viewpoint of improving the skin feel after bathing and from the viewpoint of handleability. The particle shape of the component (A) is not particularly limited as long as it is porous, and examples thereof include spherical, columnar, plate-shaped, and scaly particles. Further, the component (A) may be either hollow particles or solid particles.

The average particle size of the component (A) is preferably 0.5 μm or more, more preferably 1 μm or more, still more preferably 2 μm or more, and preferably 25 μm or less, from the viewpoint of improving the skin feel after bathing. It is more preferably 20 μm or less, still more preferably 10 μm or less.
The average particle size of the component (A) can be measured by, for example, a laser diffraction type particle size distribution measuring device.

Commercially available porous silicic anhydride can also be used as the component (A). For example, Syropure series such as "Syropure 25" and "Syropure 30" manufactured by Fuji Silicia Co., Ltd., Syricia series such as "Syricia 320", "Syricia 350", "Syricia 550", "Syricia 730", etc. "Sunsphere H-31", "Sunsphere H-32", "Sunsphere H-33", "Sunsphere H-51", "Sunsphere H-52", "Sunsphere" manufactured by AGC SI Tech Co., Ltd. Sunsphere H series such as "Fair H-53", "Sunsphere H-121", "Sunsphere H-122", "Sunsphere H-201", "Sunsphere L-31", "Sunsphere L-51" Sunsphere L series such as "Sunsphere H-51-ET", Sunsphere ET series such as "Sunsphere H-121-ET", "Godball E-2C" manufactured by Suzuki Oil & Fat Co., Ltd., " "Godball E-6C", "Godball E-16C", "Godball D-11C", "Godball B-6C", "Godball B-25C", "Godball AF-6C", "Godball" Examples include the Godball series such as "AF-16C" and "Godball SF-16C", and the Sorbosil series such as "Sorbosil AC23", "Sorbosil AC33", "Sorbosil AC43" and "Sorbosil AC44" manufactured by PQ Corporation.

The content of the component (A) in the bathing agent of the present invention is 1.5% by mass or more, preferably 2% by mass or more, more preferably 2.5, from the viewpoint of improving the skin feel after bathing. It is by mass% or more, more preferably 2.7% by mass or more. Further, from the viewpoint of improving storage stability, it is 10% by mass or less, preferably 9% by mass or less, more preferably 8% by mass or less, still more preferably 6% by mass or less, still more preferably 5% by mass or less. is there.

<Component (B): Carbonate>
The bathing agent of the present invention contains a carbonate as a component (B). When the bathing agent of the present invention is put into bath water, the component (B) can generate carbon dioxide gas by the action with the component (C) described later, and can bring about a blood circulation promoting effect.
The component (B) includes alkali metal carbonates such as sodium carbonate and potassium carbonate; alkaline earth metal carbonates such as calcium carbonate and magnesium carbonate; and alkali metal bicarbonates such as sodium hydrogen carbonate and potassium hydrogen carbonate; Etc., and these can be used alone or in combination of two or more. Among them, from the viewpoint of imparting better foamability, one or more selected from the group consisting of sodium carbonate, sodium hydrogen carbonate, and calcium carbonate is preferable, and one selected from the group consisting of sodium carbonate and sodium hydrogen carbonate. The above is more preferable.
The component (B) preferably contains an alkali metal carbonate from the viewpoint of imparting good moldability when molding the bathing agent into tablets and the like and imparting warming speed at the time of bathing, and suppresses the foaming power of carbon dioxide gas. From the viewpoint of imparting, it is preferable to contain alkali metal bicarbonate. That is, as the component (B), it is preferable to contain an alkali metal carbonate and an alkali metal bicarbonate, and it is more preferable to contain sodium carbonate and sodium hydrogen carbonate.

When the alkali metal carbonate and the alkali metal bicarbonate are used in combination as the component (B), the ratio is not particularly limited, but the mass is from the viewpoint of imparting good moldability, warming speed at the time of bathing, and foaming power. The ratio [alkali metal bicarbonate / alkali metal carbonate] is preferably 0.2 or more, more preferably 0.3 or more, still more preferably 0.5 or more, preferably 4.0 or less, more preferably. It is 2.0 or less, more preferably 1.5 or less, still more preferably 1.0 or less.

The content of the component (B) in the bathing agent of the present invention is preferably 10% by mass or more, more preferably 15% by mass or more, still more preferably 20% by mass or more, from the viewpoint of imparting better foamability. It is still more preferably 30% by mass or more, preferably 70% by mass or less, more preferably 60% by mass or less, still more preferably 55% by mass or less, still more preferably 45% by mass or less.

<Component (C): Organic acid>
The bathing agent of the present invention contains an organic acid as a component (C). Since the bathing agent of the present invention contains the component (C), carbon dioxide gas can be generated by the action with the component (B) in the bath water to bring about a blood circulation promoting effect.

Examples of the component (C) include an organic sulfonic acid compound and an organic phosphoric acid compound in addition to the carboxylic acid compound, but the carboxylic acid compound is preferable from the viewpoint of imparting good foamability.
The carboxylic acid compound may be any compound having at least one carboxy group, and may be either an aliphatic carboxylic acid or an aromatic carboxylic acid. Specific compounds include, for example, fumaric acid, tartaric acid, succinic acid, malic acid, citric acid, maleic acid, phthalic acid, glutaric acid, and adipic acid as aliphatic carboxylic acids, and benzoic acid, salicylic acid, and shu. Examples thereof include acid and pyrrolidone carboxylic acid. Among them, from the viewpoint of ensuring storage stability, an aliphatic carboxylic acid is preferable, and an aliphatic polyvalent carboxylic acid having two or more carboxy groups is preferable, fumaric acid, tartaric acid, succinic acid, malic acid, citric acid, and the like. One or more selected from the group consisting of adipic acid and oxalic acid is more preferable, and one or more selected from the group consisting of fumaric acid, tartaric acid, and succinic acid is more preferable, and one or more selected from the group consisting of fumaric acid and succinic acid. One or more of them are more preferable, and fumaric acid is even more preferable.

The content of the component (C) in the bathing agent of the present invention is preferably 10% by mass or more, more preferably 20% by mass or more, still more preferably 30% by mass or more, and more, from the viewpoint of imparting good foamability. More preferably, it is 35% by mass or more. Further, the content of the component (C) in the bath preparation is preferably 70% by mass or less, more preferably 65% by mass or less, still more preferably 60% by mass or less, still more, from the viewpoint of imparting good foamability. It is preferably 50% by mass or less.

<Component (D): Amino acid-based surfactant>
The bathing agent of the present invention contains an amino acid-based surfactant as the component (D). Since the bathing agent of the present invention contains the component (D), the storage stability is excellent even when the component (A) is contained in an amount of 1.5% by mass or more due to the above-mentioned mechanism of action.
In the present invention, the amino acid-based surfactant is a surfactant having a structure derived from an amino acid. From the viewpoint of obtaining a bathing agent having excellent storage stability, the swelling of the packaging material is unlikely to occur even when the packaging material is sealed and stored in the packaging material, and the component (D) is N- in which the amino group of the amino acid is modified with an acyl group. It is preferably an acyl amino acid or a salt thereof, and more preferably an N-acyl amino acid salt.

In N-acylamino acids or salts thereof, the amino acids that form the amino acid-derived structure include acidic amino acids such as glutamate and aspartic acid; glycine, alanine, β-alanine, methylalanine, valine, leucine, isoleucine, cysteine, proline, Examples thereof include neutral amino acids such as serine, threonine and sarcosin. Of these, acidic amino acids are preferable from the viewpoint of improving storage stability under acidic conditions, one or more selected from the group consisting of glutamic acid and aspartic acid is more preferable, and glutamic acid is further preferable. These amino acids may be D-form, L-form, or a mixture of D-form and L-form, but L-form is preferable.

As the acyl group in the N-acyl amino acid or a salt thereof, an acyl group having a saturated or unsaturated linear or branched chain and having 8 or more and 22 or less carbon atoms is preferable from the viewpoint of improving storage stability. Examples of the acyl group include a caproyl group, a capryloyl group, a caprinoyl group, a lauroyl group, a myritoyl group, a palmitoyl group, a stearoyl group, an isostearoyl group, an oleoil group, a linole oil group, a cocoyl group (palm oil fatty acid acyl group), Examples thereof include palm oil fatty acid acyl group, palm kernel oil fatty acid acyl group, beef fat fatty acid acyl group, linear and branched synthetic fatty acid acyl group and the like.
Of these, from the viewpoint of improving storage stability, an acyl group having a saturated or unsaturated linear or branched chain and having 12 or more and 22 or less carbon atoms is more preferable, and the acyl group has a more preferably 12 carbon atoms. It is 18 or more, more preferably 12 or more and 16 or less. Specifically, as the acyl group in the N-acyl amino acid or a salt thereof, one or more selected from the group consisting of a lauroyl group, a myristoylation group, a palmitoyl group, a stearoyl group, and a cocoyl group is more preferable, and a lauroyl group and a myristoylation group are more preferable. One or more selected from the group consisting of a group, a palmitoyl group, and a stearoyl group is more preferable, and one or more selected from the group consisting of a lauroyl group and a myristoylation group is even more preferable.

The N-acylamino acid salt may be either an inorganic salt or an organic salt of N-acylamino acid. Examples of the inorganic salt of N-acylamino acid include alkali metal salts such as sodium and potassium; alkaline earth metal salts such as calcium and magnesium; and the like. Examples of the organic salt of N-acylamino acid include organic amine salts such as ammonia, monoethanolamine, diethanolamine and trietanolamine salts; and basic amino acid salts such as arginine, lysine, histidine and ornithine.
Of these, from the viewpoint of improving storage stability, one or more selected from the group consisting of alkali metal salts of N-acyl amino acids, organic amine salts, and basic amino acid salts is preferable, and alkali metal salts are more preferable. One or more selected from the group consisting of sodium salt and potassium salt is more preferable.
That is, the N-acylamino acid salt is preferably selected from the group consisting of the sodium salt or potassium salt of N-acylglutamic acid and the sodium salt or potassium salt of N-acylaspartic acid from the viewpoint of improving storage stability1. More than a species, more preferably a sodium or potassium salt of N-acylglutamic acid. The acyl group has preferably 12 or more and 22 or less carbon atoms, more preferably 12 or more and 18 or less carbon atoms, and further preferably 12 or more and 16 or less carbon atoms.

Specific examples of the N-acylamino acid or a salt thereof used as the component (D) include N-capryloyl glutamic acid, N-2-ethylhexanoyl glutamic acid, N-lauroyl glutamic acid, N-myristoyl glutamic acid, and N-palmitoyl glutamic acid. , N-stearoyl glutamic acid, N-cocoyl glutamic acid, N-palm oil fatty acid acyl glutamic acid, N-beef fat fatty acid acyl glutamic acid, N-lauroyl glutamic acid, N-myristoyl aspartic acid, N-palmitoyl aspartic acid, N-stearoyl aspartic acid, N-cocoyl aspartic acid, N-cocoyl alanine, N-lauroylmethylalanine, N-myristoylmethylalanine, N-cocoylmethylalanine, N-lauroyl sarcosin, N-myristoyl sarcosin, N-cocoyl sarcosin, and sodium salts thereof. , Potassium salt, arginine salt, triethanolamine salt and the like.
Among these, one or more N- selected from the group consisting of N-lauroyl glutamic acid, N-myristoyl glutamic acid, N-palmitoyl glutamic acid, N-stearoyl glutamic acid, and N-cocoyl glutamic acid from the viewpoint of improving storage stability. A sodium salt or potassium salt of acylglutamic acid is preferable, and one or more selected from the group consisting of a sodium salt or potassium salt of N-lauroyl glutamic acid and a sodium salt or potassium salt of N-myristoyl glutamic acid is more preferable.

A commercially available amino acid-based surfactant can also be used as the component (D). For example, "Amisoft LS-11" (N-lauroyl-L-sodium glutamate), "Amisoft CS-11 (F)" (N-cocoyl-L-sodium glutamate), "Amisoft MS-11" manufactured by Ajinomoto Co., Ltd. (N-Misodium glutamate), "Amisoft MK-11" "Amisoft MK-11 (F)" (N-Misodium-L-potassium glutamate), "Amisoft GS-11P" (N-stearoyl-L- (A mixture of monosodium glutamate and N-cocoyl-L-sodium glutamate), "Amisoft HS-11P" (N-stearoyl-L-sodium glutamate) and the like can be mentioned.

In the bathing agent of the present invention, the mass ratio [(D) / (A)] of the component (D) to the component (A) is 0.01 or more, preferably 0.015 or more, from the viewpoint of imparting storage stability. From the viewpoint of improving the skin feel after bathing, it is 1 or less, preferably 0.8 or less, more preferably 0.5 or less, still more preferably 0.2 or less, still more preferably 0.1 or less. is there.

The content of the component (D) in the bathing agent of the present invention may be such that the mass ratio [(D) / (A)] of the component (D) to the component (A) is preferably in the above range. From the viewpoint of imparting storage stability, it is preferably 0.01% by mass or more, more preferably 0.02% by mass or more, still more preferably 0.04% by mass or more in the bath preparation. The content of the component (D) in the bathing agent is preferably 3% by mass or less, more preferably 2% by mass or less, still more preferably 1% by mass or less, from the viewpoint of improving the skin feel after bathing. Even more preferably, it is 0.5% by mass or less.

(Water-soluble polymer)
The bathing agent of the present invention can further contain a water-soluble polymer from the viewpoint of imparting good moldability and bath water solubility.
Examples of the water-soluble polymer include synthetic water-soluble polymers such as polyethylene glycol, polyvinylpyrrolidone, sodium polyacrylate, polyethyleneimine, and polyvinyl alcohol; starch, gelatin, collagen protein, casein, sodium alginate, carrageenan, and furcereran. Natural water-soluble polymers such as tamarind gum, pectin, arabic gum, guar gum, xanthan gum, tragant gum, locust bean gum, dextrin, dextran, agar, starch; carboxymethyl cellulose, methyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, cellulose acetate, Semi-synthetic water-soluble polymers such as propylene glycol alginate, oxidized starch, esterified starch, etherified starch, and cationic starch; and the like; one or more of these can be used. Among them, one or two selected from the group consisting of polyethylene glycol and dextrin is preferable, polyethylene glycol is more preferable, and the molecular weight is 3,000 to 10,000, from the viewpoint of imparting good moldability and bath water solubility. Is more preferable, and polyethylene glycol having a molecular weight of 5,000 to 9,000 is even more preferable.

The content of the water-soluble polymer in the bath preparation is preferably 1% by mass or more, more preferably 1.5% by mass or more, still more preferably 2% by mass, from the viewpoint of imparting good moldability and bath water solubility. % Or more. Further, from the viewpoint of securing the amount of carbon dioxide gas generated, the content is preferably 20% by mass or less, more preferably 15% by mass or less, and further preferably 12% by mass or less.

As other components, the bathing agent of the present invention may appropriately contain components usually used for bathing agents. Such components include, for example, nonionic surfactants such as sucrose fatty acid esters, polyethylene glycol fatty acid esters, polyoxyethylene alkyl ethers, polyoxyethylene hydrogenated castor oil, and other surfactants; potassium chloride, sodium chloride, potassium nitrate. , Sodium nitrate, sodium polyphosphate, ammonium chloride, iron sulfate, sodium phosphate, sodium thiosulfate, and other inorganic salts other than the above components; excipients such as calcium silicate and glucose; disintegration aids; medicinal properties of crude drugs, etc. Ingredients; pigments; fragrances; oils; etc.

(Drug type)
The dosage form of the bath preparation of the present invention may be powder, granules, granules, or tablets. Tablets are preferable from the viewpoint of ensuring high solubility even after long-term storage. Tablets include tableted tablets and briquette molds.
When the bathing agent is powder or granules, it can be produced, for example, by dry-blending all the components constituting the bathing agent according to a conventional method. At that time, a part of the components may be granulated or molded in advance and then mixed with the remaining components.
When the bathing agent is granular, it can be produced according to a conventional method such as a compression granulation method such as extrusion granulation.
When the bathing agent is a tablet, it can be produced by using a press tableting machine or a briquette machine according to a conventional method such as a compression molding method. In the production of tablets, for example, a powder obtained by dry-blending all the components constituting a bath agent may be subjected to compression molding, and a part of the components may be previously granulated or molded and then combined with the remaining components. The mixture obtained by mixing may be subjected to compression molding.

[Bath products]
The present invention also provides a bath preparation product in which the above-mentioned bath preparation of the present invention is encapsulated in a packaging material. The bathing agent of the present invention is excellent in storage stability in the product form enclosed in the packaging material because swelling of the packaging material due to the generation of carbon dioxide gas is unlikely to occur even when the packaging material is sealed and stored in the packaging material.
The shape of the packaging material is not particularly limited as long as it has a structure capable of sealing the bathing agent, and examples thereof include a bag shape, a bottle shape, a tray shape, and a cup shape. Among these, a bag-shaped packaging material is preferable.
The material constituting the packaging material is not particularly limited as long as it can seal the bathing agent. For example, in the case of a bag-shaped packaging material, a resin film or a laminated film in which an inorganic thin film made of metal or a metal oxide is laminated on the resin film can be used.

Hereinafter, the present invention will be described with reference to Examples, but the present invention is not limited to the scope of the Examples.

Examples 1-14, Comparative Examples 1-7 (Manufacturing and evaluation of bath preparation)
Using the powder obtained by mixing each component shown in Table 1, tableting was performed with a rotary tableting machine to a size having a mass of 39 to 41 g and a tablet height of 15.1 to 15.3 mm. A tablet-type bath preparation was produced. In addition, the skin feel and storage stability after bathing were evaluated by the following methods. The results are shown in Table 1.

(Evaluation of skin feel after bathing)
Put 150 L of bath water at 40 ° C in the bathtub, add 40 g of the bathing agent of each example, stir well, and then let two specialized panelists take a bath for 5 minutes, and make the skin feel (smooth feeling) after bathing according to the following criteria. evaluated.
1: Very smooth feeling 2: Very smooth feeling 3: Slightly smooth feeling 4: No smooth feeling at all

(Evaluation of storage stability)
40 g of the bathing agent of each example was placed in an aluminum pillow (manufactured by Dai Nippon Printing Co., Ltd., 6 cm x 18 cm), sealed, placed in an incubator set at 50 ° C., and one month after the placement. The appearance of the aluminum pillow was visually observed and evaluated according to the following criteria.
A: No change in the appearance of the aluminum pillow B: Very slight swelling in the appearance of the aluminum pillow C: Large swelling in the aluminum pillow

* 1: Porous light silicic anhydride: "Sorbosil AC44" (average particle size: 4.7 μm) manufactured by PQ Corporation or "Silo Pure 25" manufactured by Fuji Silysia Chemical Ltd.
* 2: N-lauroyl-L-sodium glutamate: "Amisoft LS-11" manufactured by Ajinomoto Co., Inc.
* 3: Potassium N-myristoylation-L-glutamate: "Amisoft MK-11" manufactured by Ajinomoto Co., Inc.
* 4: Polyethylene glycol: "K-PEG 6000LA" manufactured by Kao Corporation (molecular weight: 6,000)

From Table 1, it can be seen that the bathing agent of the present invention has a smooth skin feel after bathing and is excellent in storage stability because the packaging material is less likely to swell even when it is sealed and stored in the packaging material.

According to the present invention, it is possible to provide a bathing agent having a smooth skin feel after bathing and having excellent storage stability with less swelling of the packaging material even when the packaging material is sealed and stored.

Claims (4)

The following components (A) to (D):
(A) Porous silicic acid anhydride 1.5% by mass or more and 10% by mass or less (B) Carbonate (C) Organic acid (D) Amino acid-based surfactant is contained, and the component (D) with respect to the component (A) A bathing agent having a mass ratio [(D) / (A)] of 0.01 or more and 1 or less. The bathing agent according to claim 1, wherein the component (D) is an N-acylamino acid salt. The bath agent according to claim 1 or 2, wherein the content of the component (D) is 0.01% by mass or more and 3% by mass or less. A bath agent product in which the bath agent according to any one of claims 1 to 3 is sealed in a packaging material.